Air-cooled refrigeration apparatus



April 1930. J. R. REPLOGLE AIR COOLED REFRIGERATION APPARATUS 1926 4Sheets-Sheet Filed Oct. 26

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O am 1 ATTQA /VEM April 8, 1930. J. R. REPLOGLE 1,753,944

AIR COOLED REFRIGERATION APPARATUS Filed 001: 26, 1926 4 Sheets-Sheet 524 ATTOP/VfV.

April 8, 1930. J. R. REPLOGLE 1,753,944

AIR COOLED REFRIGERATION APPARATUS Filed Oct. 26, 1926 4 Sheets-Sheet 4EiQZEMQiLL? Patented Apr. & TQFO s rai JOHN R. REPLOGLE, OF DETROIT,MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

KIIELVINATOR CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF. MICHI-AIR-COOLED REFRIGERATION APPARATUS Application filed October 26, 1926*.Serial No. 144,249.

This invention relates to mechanical refrigeration apparatus of the typeemploying a motor-driven compressor and an air-cooled condenser. I F Theinvention has for one of its objects, the

provision of an air-cooled compressor-condenser unit, the several partsof which are so arranged that a highly compact and efficient device isproduced.

Another object of the invention is the production of a highly efficientunit of the motor-driven compressor, air-cooled condenser type byemploying an improved arrangement of the several parts of this unit withrespect to an enclosing casing.

Another object of the invention is to provide a refrigeration unit ofthe character referred to having an improved arrangement of the partswhich form the air-cooled condenser with respect to each other and alsowith respect to the remaining parts of the unit.

Another object of the invention is to provide for the efficient coolingof the cylinder Walls and exhaust valve of the compressor.

Another object of the invention is to provide a motor drivencompressor-condenser unit of the air-cooled type in which the compressoris so mounted and so connected with the condenser as to minimize noisedue to vibration ofthe parts.

Another object of this invention is the provision of acompressor-condenser mechanism having a maximum number of parts equallyapplicable to water and air-cooling.

Another object is the provision of a compressor condenser refrigerationunit of the air-cooled type having suitable manually operated cut-offvalves in the several conduits which transfer the refrigerant from oneelement of the unit to another so that the different elements can bedisconnected one from the other without any considerable loss of therefrigerant from the system.

Further objects more or less incidental or ancillary to the foregoingwill appear in the following description in connection with the accompanin drawings which show a preferred em odiment of the invention.

In the drawings,

Fig. 1 shows a front elevation of the apparatus with certain partsbroken away so as to disclose the interior of the compartment casing.

Fig. 2 is a side elevation of the apparatus with parts broken away.

Fig 3 is a partial section online 33 of Fig. 2 showing in particular themotor drive and compressor unit. I

Fig: 1 is a diagrammatic View of the compressor unit and vaporizer andconnections therebetween.

Fig. 5 is a vertical cross section of end connections of the vaporizer.

Fig. 6 is an enlarged cross section on line 6-6, Fig. 1.

Fi 7 isan enlarged cross section on-the line,?'?, Fig. 2.

Fig. 8 is an enlarged sectional detail view of an end of the vaporizerused in this apparatus.

The means for housing the motor-compressor-condenser unit is clearlyshown in Figs. 1 and 2. This means is in the form of a rectangularshaped casing designated as an entirety by the numeral 1 and having itslower end adapted to rest on some suitable support such as the floor ofthe building. The bottom, top, back, front and end walls of the casingare in the'form of sheet metal panels; 1, 1*, 1, 1 and 1 respectivelywhich are carried by an interior frame structure formed of angle ironbars connected together in such a manner as to form a rigid skeletonstructure. This frame structure comprises a horizontally disposedrectangular shaped set of angle bars 4 at the bottom of the casing, onthe horizontal flanges of which bars 4, rests the floor board 2 of thecasing. A second hori zontal set of angle barsfi, which are identical inconstruction with the set 4:, forms the supporting frame work for a topboard 17 of the casing structure. A third horizontal set of angle bars5is arranged between the first two sets mentioned and forms strengtheningmeans for the mid portions of the structure. The reference character 7;?indicates four vertically arranged angle bars, each one of which isconnected at its lower end to one of till the four corners of the lowerset of angle bars 1, and is connected at its other end to one of thefour corners of the middle set 5. The connection at the lower end ofangle bars 7 is effected by means of gussets 9, and the upperconnect-ion referred to is effected by means of gussets 10. The top setof angle bars 6 is secured to the intermediate set 5 by means ofvertically arranged angle bars 8, 8. Each bar 8 is connected at itslower end to a corner of the intermediate set 5 by means of angle plates11, and is connected at its upper end to a corner of the top set ofangle bars 6 by means of gussets 12. These above mentioned connectionsare made by some suitable means such as bolts, rivets, or the like. Thethree sets of horizontally arranged angle bars which are connectedtogether at their corners by means of the vertically arranged anglebars, described above, together form the interior skeleton frame work towhich the end, front, baclt and top panels of the casing are secured byscrews or the like. The finishing strips 14: are secured at the outervertical corners of the casing after the panels have been fixed to theskeleton. frame structure. The top panel 1 has its turned down edgessecured by screws to the top set of frame bars 6 and is backed by thetop board 17 which rests on spacing blocks 18. These blocks 18 rest onand are secured to the horizontal flanges of the upper set of angle bars6.

The casing is divided into upper and lower compartments 19 and 20,respectively, by means of a horizontal partition 21. This partition hasits outside edges bent upwardly to form attaching flanges. hese flangesare secured to the vertical. sides of gussets 10, 10 at the four cornersof the casing by means of screws 22 (see Fig. 2) The partition 21 has anaperture 23 therein for a purpose to be hereinafter described. The frontpanel of the casing has louvers 24 opening into the compartment 20. Theback and end panels of the casing have louvers 25 connecting theinterior of the upper compartment with the atmosphere. The louvers inthe upper and lower compartments and the aperture 28 in the dividingpartition are provided so as to provide for t e circulation of air inainanner to be hereinafter described.

Tn the lower compartment of the casing is disposed the motor drivencompressor, the air cooling fan, and a. dome-like casing surrounding theupper part of the compressor cylinder and constituting, in efiect, apart of the condenser, while in the upper compart ment 1%? is disposed aseries of coils forming the slain part of the condenser.

The compressor is indicated in its entirety by reference character 50and has a cylinder 51 projecting into the open upper end of its crankcase 52 and is secured thereto by means of bolts lts piston 54 isadapted to reciprocatc in the cylinder and is attached to a crank 55 bymeans'of a connecting rod 56. The upper end of the compressor cylinderis closed by means of cylinder head 57 which has a central opening 58therethrough. Spring pressed valve 59 is adapted to periodically openand close this opening in the cylinder head so as to allow thecompressed refrigerant to escape from the compressor. The crank 55 isdriven by means of a hori zontal shaft 60 which is connected to thelower end of the motor shaft 61 by means of suitable Worm gearing. Thecrank is connected to this horizontal shaft 60 by means of an integralsleeve 62 fitting over the end of the shaft, thereby forming a bearingfor one end of the shaft. The opposite end of this shaft is journaled ina bearing 63 located in a cover Get for the gear casing 65.

The motor 66, which drives the compressor by means of suitable wormgearing and the connections just described, is of the universal type. Ithas a vertical shaft 61 to which is secured the armature 67. Thisarmature is surrounded by a stator or field structure 68 which iscylindrical exteriorly and has its lower end resting on the outside edgeof the horizontal flange 70 of the gear casing 65.

The construction of the motor, the compressor, and their drivingconnections is the same as is set forth in my copending application,Serial No. 475,344 filed June 6, 1921, to which reference can be madefor some of the structural details.

As can be seen from an examination of Fig. 8, the fan 74- is secured tothe movable parts of the motor by means of a bolt 72, and spacing sleeve73. This bolt has a flanged head which rests on the upper surface of thefan. The shank part thereof extends through the spacing sleeve 73 and isscrewed into the uper end of the vertical shaft 61. This spacing sleeve73 rests on the upper end of the armature core and is rigidly securedthereto by means of the bolt 72 clamping the sleeve between the undersurface of fan 74 and the upper end of the armature core. Uprightcylindrical casing 75 for the fan 74 rests on the stator 68 at the outeredge thereof. This casing surrounds the fan 74 and has openings 7 6 atits lower end, through which air is supplied to the fan. The upper endof the casing is arranged directly under the opening 23 in the partition21.

Telescoping over the upper end. of the compressor cylinder 51 is adome-shaped casing 80. The upper end of the dome has provided therein.an opening 88, and at the lower end of the dome 80 are openings 89 and90. The opening 88 is connected to a conduit 105 by means of aconnection 112. This conduit leads to the inlet end of an air-cooledcondenser to be presently described, and the opening 90 is connected bymeans of a connection 114 to a second conduit 10'? which leads to theoutlet end of this air-coolcd condenser.

The opening 89 is closed by means of a plug 89 (Fig. 2). An opening 91is provided in the vertical flange 77 of the compressor, crank case 52(Fig. 1). 'This opening communicates at its innerend with the dome andat its outer end with a connection 92 which is connected by means of aconduit 118 with the inlet end of a vaporizer.

It will thus be seen that T have provided in the lower compartment 20 ahighly compact motor-compressor unit. The lower end of the dome 80serves as a sump for liquid refrigerant which is returned from thecondenser to the dome through the connection 114. At the inner side ofthis opening is a goose-neck tube 94 connected to the dome at thisopening by means of some suitable connection such as 95. The upper endof this goose-neck tube is arranged directly over the discharge valve 59so that the liquid refrigerant coming from the condenser will pour overthe discharge valve and down the sides of the compressor cylinders 51and thereby cool the parts. This liquid pouring on the discharge valvealso has a damping action thereon. At the exhaust end 'of the tube 94 isarranged a screen 96 to catch any particles of foreign matter which mayhave accumulated in the system so as not to interfere with the operationof the discharge valve 59. An opening 97 is provided in the tube rightabove the screen 96 so that should the screen 96 become entirely cloggedwith foreign matter, liquid refrigerant can still find its way outthrough this opening 97.

The motor, fan, gear case, compressor and the dome are all rigidlyconnected together and they are the parts of the unit which are subjectto vibration due to their operation. These parts are attached to-thefloor board 2 of the lower compartment 20 of the enclosing casing bymeans of a spring mounting. The purpose of this spring mounting is topermit this necessary vibration in the moving parts and at the same timeto prevent its being transferred to the enclosing casing. The springmounting alone is not a part of the present invention, it having beendescribed and claimed in my copending application Serial No. 733,913,filed August 25. 1924, to which reference may be had for the structural.details. However, this spring mounting in combination with a peculiarrefrigerant pipe connection to be hereinafterv described does form animportant part of this invention.

The gear case has formed thereon a pro jection 250 which rests on a bar26. This bar has apertures therein for the passage of stud bolts 27which latter are rigidly connected to the floor board of the casing.Arranged on these stud bolts are collars 28 which are held againstoutward movement by means of nuts 29. Arranged between the collars 28and the bar 26 are springs 30. The bar 26 fits loosely on the stud boltsso that reciprocation is permitted i. e.,- as much as the springs 30will permit. It ,will be seen from an examination of Fig. 1 that I haveprovided a second bar 31 which is clamped at each end to the floorboard. The gear casing and the crank case of the compressor have parts(notshown) from which parts stud bolts 31* extend. These stud boltsextend through the bar 31 and have springs 33 attached to each sidethereof in a manner similar to that described in connection with springs30 and stud bolts 27, the only difference being that the upper spring 33carries the weight of the motorcompressor unit instead of the lowerspring 30, as was described above in connection with bar 26 and studbolt 27.

It will be noted from the examination of Fig. 2that the conduit 105 isbent in the form of a loop or helix 111 just before it enters theconnection 112. This connection 112 is attached to the dome 80 at theopening 88 as was described above. It will also be noted that conduit107 is likewise bent in the form of a loop or helix 113 before it entersthe dome 80 at the opening 90 through connections 114. These loops 111and 113 provide flexible connections between the dome and the condenser.Their purpose is to permit the vibration of the dome and motorcompressor parts due to their spring mounting without injury to theconduits 105 and 107 and their connections 112 and 114.

In the upper compartment 19 of the casing, I have constructed animproved air-cooled condenser. This condenser consists in an up perheader tube and a lower header tube 101. These headers are supported inposition at each end by means of'connections 102. These connections 102are rigidly attached to the horizontal flange of the sets of angle bars5 and'6 by means of bolts 103. This connection means and arrangement ofthe header can clearly be seen from an examination of Fig. 1.

It will be noted that the upper header 100 is inclined downwardly towardthe right of Fig. 1, and the header 101 is inclined downwardly towardthe left of Fig. 1. These headers are so inclined. in order that therefrigerant will quickly pass through the condenser by means of gravity.as soon as it is in a liquid form. This will prevent the liquidrefrigerant. and also any globules of oil which might be in thecondenser from clogging up the passages and thereby hinderingthefreecirculation of the gaseous refrigerant.

The upper end of the upper header 100 has an inlet pipe connection 104in which the metallic conduit 105 is inserted. This conduit 105 leads tothe opening 88 in the dome-shaped casing 80 as will be seen from anexamination of Fig. 3. The lower end of the lower header 101 also has aconnection 106 in which a second metallic conduit 107 is inserted. Thisconduit 107 is connected by the connection 114 at its other end to theopening 90 in the dome-shaped casing 80.

Arranged between the two headers are coils of copper pipe 108. Thesecoils are wound in the shape of a helix and connected at their upperends with the upper header 100 and at their lower ends with the lowerheader 101. These coils 108 are arranged at each side of a verticalplane extending through the headers 100 and 101, as shown in Fig. 2.They are eight in number, four being on each side of the plane andarranged in parallel relation to each other along the headers. Thesecoils are wound in square or rectangular form so that the maximum amountof pipe can be arranged in the minimum amount of space so as to provideas much cooling surface as possible.

The gaseous refrigerant, which is forced into the upper header by meansof the compressor, is cooled as it passes through the condensing coils108. This cooling action changes the gaseous refrigerant to a liquid.This co'oling action is effected by means of a current of air which isforced, by the fan 74 through the aperture 23 in the dividing partition21 around the condensing coils and out through the louvers in the upperpart of the enclosing casing. As the refrigerant turns to a liquid formit flows downward into the lower header and from there into the dome 80.

The right-hand ends of the headers 100 and 101 are connected together bymeans of a conduit 109. This conduit is bent to form a trap 110. Thepurposeof this conduit 109 isto drain any lubricating oil which mighthave been deposited in the upper header so that this oil will not passthrough the condensing tubes and thereby hinder the free passage ofrefrigerant. The trap 110 is provided in the conduit 109 so that gaseousrefrigerant is prevented from taking a shortcut from the upper to thelower header without going through the condensing tubes 108.

It will be seen that I have arranged the lower end of the air-cooledcondenser above the discharge valve of the compressor. This permits agravity flow of the liquid refrigerant from the condenser to thedischarge valve by means of the goose-neck tube 94 described above. Theabove described operation provides an efficient cooling means for thedischarge valve and compressor cylinder.

The complete apparatus is shown diagranr matically in Fig. 4. Thecompressor condenser unit is designated by reference character 1 and thespace to be cooled by 116 and the vaporizer by 117, the vaporizer beingof the flooded type. Leading from the compressorcondenser unit to thevaporizer are three con duits designated by the reference characters118, 119 and 120. The conduit 118 leads from the connection 92 to theinlet connection 121 of the vaporizer. As described above, theconnection 92 registers with a passageway 91 which opens into the lowerend of the condenser sump or dome 80. This conduit 118 transfers theliquid refrigerant from the dome to the vaporizer. The conduit 119 isconnected at its upper end to the outlet connection 122 of the vaporizerand is connected at its lower end to a connection 83 which is located onthe side of the crank case of the compressor and registers with anopening therein. This conduit 119 serves to transfer the gaseousrefrigerant from the vaporizer to the crank case of the compressor. Theconduit 120 is connected at its upper end to the vaporizer by means ofconnection 123 and at its lower end to a low pressure sylphon (notshown) within the casing 124. The sylphon is provided. as will bereadily understood, for the purpose of automatically controlling theoperation of the unit from the low pressure side of the system. When thepressure goes above a certain predetermined amount in the vaporizer 117the sylphon 124 will automatically close a motor switch (not shown)within the casing 124 and start the operation of the apparatus. \Vhenthe pressure in the vaporizer falls below a predetermined amount thepressure on the sylphon will be relieved and the motor switch will beopened thereby stopping the operation of the motor. A furtherdescription of the particular construction of the sylphon and the motorswitch is deemed unnecessary as this matter has been fully disclosed inmy copending application Serial No. 475,344.

The connection 92 at the base of the compressor has a conduit 125leading to another sylphon (not shown) within the casing 126 which alsocontrols the motor. This conduit 125 is in communication with the highpressure side of the unit, that is, the lower part of the dome 80. Ifthe pressure at this point rises above a certain point, the motor willbe automatically stopped by the sylphon 126.

cylinder, the air-cooled condenser, the va porizer and their connectingtubes form a closed system for the circulation of the refrigerantmaterial. I prefer to use sulphur dioxide as the refrigerant materialfor this apparatus; but this invention is not limited to this particularuse as other materials will operate satisfactorily.

In this apparatus I prefer to use, as a lubricant, a suitable mineraloil. The properties of such a mineral oil have been fully set forth incopending application Serial No. 47 5,344. It need only be observed herethat such oil-is soluble to some extent in liquid sulphur dioxide. Thisoil circulates throughout the system along with the sulphur dioxide, andperforms the lubricating functions as set forth in my copendingapplication referred to.

It will be noted that I have provided efficient manually operatedcut-off valves. These valves are located in the connections 92,112, 121,122 and 123. Cross sections of all these connections are shown in Figs.5, 6 and 7. The purpose of these manually operated cut-off valves 'is toallow the several parts of the entire apparatus to be disconnected onefrom the other without losing a considerable amount of either gas orliquid refrigerant. This is highly desirable for shipping purposes, andalso in case any part should get out of order.- This part could then bedisconnected from the unitand repaired without affecting the remainingparts.

Referring first to Fig. 6 which shows the connection 92, it will benoted that the needle val e 127 is located ahead of the opening 128,which opening is connected to the condult 125. The connection 92 has aboss 129 formed thereon, through which extends the tapered passage 130.The stem of the needle valve extends through this passage and a packing131. This packing is compressed by a threaded gland 132 which engagesthe side of the passage 130 in the boss 129. The valve stem has asquared outer end 133 or the reception of a tool to open and close thesame. The tapered passage 130 in the boss 129 is tightlv closed at itsouter end by means of a threaded plug 134, thus precluding any escape ofrefrigerant which might leak past the packing.

The operation of the needle valve and its related parts in connections112. 121, 122 and 123 shown on page 4 of the drawing is identical withthat just described. The needle valve 136 in connection 112 closes apassageway leading to a charging and purging opening 137 from theinterior of the dome 53. This charging and purging opening 137 is closedby means of a plug 138 (see Fig. 7). The needle valves 139, 140 and 141close the passageways which lead from the vaporizer to the conduits 118.119 and 120 respectively. It will be readily seen that these valves canbe closed and conduits 118, 119- and 120 be removed from the vaporizerwithout the loss of any refrigerant in the vaporizer. It will beobserved upon an examination of Figs. 5 and 8 that the connection 123 isattached to a boss 1 12 on the connection 122, on the vaporizer side ofthe needle valve 140. The connection 123 is in communication with theinterior of the vaporizer by means of a tube 143 which extends into' theconnection 122 and through the passageway 144, which passageway leadsfrom the connection 122 to the interior of the vaporizer. It will beseen that this tube 143 extends above the level of the liquid in thevaporizer. This places the low pressure sylphon in communication withthe gaseous refrigerant in the vaporizer without any danger of any ofthe oil, which floats on the top of the liquid refrigrant clogging upthis connection to the control sylphon.

The operation of the apparatus is as follows:

Gaseous refrigerant is drawn from i the crank case 52 into the cylinderby means of the compressorpiston, and forced out of it through thedischarge valve into the upper part of the dome 80. From there it passesthrough opening 88 and by means of connec' tion 105 to the upper header100 of the condenser. denser coils 108 and during its passagetherethrough it is liquefied. The resulting liquid refrigerant flows bymeans of gravity through the conduit 107 to the opening 90 in the lowerend of the dome. The refrigerant flows ,through the goose-neck tube tothe discharge valve where it pours over the same and flows down thesides of the cylinder walls of the compressor and is afterward collectedat the bottom of the dome. The coils 108 perform their function ofcondensing the gaseous refrigerant by virtue of-cooling air being forcedby means of fan 7 4 up through the aperture in the partition 21 of thecasing around the coils 108 and out through the louvers 25 in thecasing. The liquid refrigerant is conducted from the lower endof thedome through connection 92 and conduit 118 to the vaporizer wherein thetemperature of the refrigerant is raised due to the absorption of heatfrom the space to be cooled. The absorption of heat by the liquidrefrigerant causes the same to be transformed into a gaseous state. Asthe transformation takes place the gas rises to the top of the vaporizerfrom whence it is conducted by means of conduit 119 to the crank case 52of the compressor thus completing the cycle of operation.

By placing the condenser in a separate compartment above themotor-compressor unit, as has been disclosed, T am able to utilize themotor shaft in directly driving the cooling fan. This direct connectiondoes away with such troublesome devices as belts, chains, gears or thelike, which easily become worn, loose, or out of order in numerous ways,which are not true of a direct connection such as the present one. Alsoby placing the condenser above the motor-compressor 1 provide thegravity flow of liquid refrigerant over the discharge valve and cylinderwalls of the compressor, thus producing a simple and efficient means ofcooling these parts at all times.

The spring mounting, as will be readily understood, is provided for themotor compressor unit so that the .natural vibration of these partsduring operation will not be transferred to its support. This springserves as a cushioning means for the mechan- Thence it passes throughthe con-' ically operating parts. By providing the loop connections at111 and at 113 in the copper conduits which connect the condenser withthe motor-compressor unit, I am enabled to permit the vibration of theunit due to the moving parts and the cushioning means, and at the sametime to prevent any damage to these copper conduits or to the condenserproper.

With the exception of the air-cooled condenser and the fan with itsattaching means, the parts which go to make up this refrigerating unitare substantially of the same construction as the corresponding partswhich comprise the water cooled unit which is described and claimed inmy copending application Serial No. 475,344. The opening 89 is used as acharging and purging means for my water cooled unit, but as the opening137 is sufiicient in this device I merely close the opening 89 by meansof the plug 89. This is highly desirable from a manufacturing point ofview as the same parts can be utilized in both units. The onlydifi'erence between the dome shaped casing here and the casing in theapplication referred to resides in the fact that I have eliminated thecondenser coils in this unit. The connections to and from the casing areidentical in both cases. In the motor in the application I have merelyextended the shaft of the prior motor and attached a fan thereto. I havealso removed the cover of the prior motor and provided the extension inits place to direct the flow of air from the fan 7 4. The motor proper,the gear casing, the compressor and the driving connections therefor andthe vaporizer are identical in both cases.

While I have shown and described in some detail the preferredconstruction and preferred arrangement of the parts and devices, it willbe understood that in all respects there can be wide variations withoutdeparting from the invention as defined in the appended claims.

What I claim as my invention is:

1. In refrigeration apparatus, a casing, a partition therein dividlngsaid casing into upper and lower compartments, an aperture in saidpartition, a motor having a vertlcally arranged shaft and a compressorgeared to the lower end of said shaft, all located in the lower of saidcompartments; coils of pipe forming a refrigerant condenser arranged 1nthe upper of said compartments, a fan connected to the upper end of saidshaft for directing a current of air from the lower of said compartmentsthrough said aperture and around said coils of pipe.

2. In refrigeration apparatus, a motor driven compressor, an air-cooledcondenser connected thereto, the lower end of the condenser beinglocated above the upper end of the discharge valve of the saidcompressor, and conduit means through which liquid refrigerant will flowby gravity from the condenser to the discharge valve of the compressor.

3. In refrigeration apparatus, a motor driven compressor, an air-cooledcondenser, the lower end of the condenser being located above the upperend of the discharge of the said compressor whereby a gravity flow ofliquid can be maintained between the said condenser and the saidcompressor, and means for conducting liquid refrigerant to the discharge end of the compressor from the said condenser to cool the same.

4. In refrigeration apparatus, a compressor having a cylinder, a chambersurrounding the said cylinder, a discharge valve in the cylinder openinginto said chamber, inlet and outlet connections in the walls of saidchamber, an air-cooled condenser connected at each end, respectively, tothe inlet and outlet connections in said chamber and means attached tothe inlet connection of said chamber for conducting the liquidrefrigerant to said exhaust valve.

5. In refrigeration apparatus, a resiliently supported power drivencompressor, a sump for liquid refrigerant rigidly connected to thecompressor structure, coils of pipe form ing the condenser, means forcooling said condenser, means for connecting the concondenser to thesaid sump, said means comprising metallic conduits arranged in loopswhereby vibratory movement of the compressor relative to the condenseris permitted.

6. In refrigeration apparatus, a motor driven compressor, a closed.chamber surrounding the discharge of said compressor, inlet and outletconnections in the walls of said chamber, a condenser having conduitsconnected to said chamber connections,

a vaporizer having conduits connected to said chamber and compressor,respectively, and manually operated cut-off valves located in theseveral conduits adjacent to the vaporizer, chamber and compressor sothat the several parts of the unit can be disassembled without losingany considerable amount of refrigerant.

In testimony whereof, I hereunto affix my signature.

JOHN R. REPLOGLE.

